fatal
adjective
· common
1
fatal, deadly
"El accidente fue fatal para los dos."
The accident was fatal for both of them.
2
terrible, awful, dreadful
Slang"Me siento fatal desde el lunes."
I've felt awful since Monday.
adverb
terribly, awfully, very badly
Slang"Canté fatal en el karaoke."
I sang terribly at karaoke.